Frigga is a young woman who was raped by a stranger as a child. Suffering from shock from this incident, she becomes a mute. One day, she heads to town to visit a highly qualified doctor about her condition. However, she misses the bus. A seemingly nice gentleman offers her a ride into town and has dinner with her, but she is drugged and is intentionally hooked onto heroine in order for the man to control her. She is forced to work in his brothel, but is given Mondays off, and she is given heroine daily, as to keep her coming back to the brothel for a supply. The pimp also forges a letter that is sent to her parents, which cruelly explains away her disappearance as abandonment. Her parents kill themselves in grief. After learning of her parents death, Frigga uses her Mondays off to train in martial arts, sharp-shooting, and driving, in order for her to take revenge on those who have wronged her.